Weed eater dies when throttled free#
In this diagram you can see the free flow of fuel in these veins that work their way right around the carburettor and up into the venturi. If you take look at the valve when rigid it reduces the pumping efficiency of the fuel available for the engine as it doesn't have the same degree of movement. When diaphragms age or are made from a substandard materials they can go stiff and rigid. On the valve there is an opening and closing motion that allows the right amount of fuel to come through so that the venturi can be filled with the fuel air mixture.
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Problems with the fuel pump diaphragm can also occur when the diaphragm ages or when a substandard diaphragm is used. The same effect occurs with a damaged cap. If this happens there'll be excess fuel spilling out and also air will be drawn into the carburettor where there should be just fuel. If the cap becomes loose or the screw holding it in place has become loose it can cause a gap. Fuel Pump Diaphragmīefore checking the fuel pump diaphragm itself, which is inside the carburettor, first check the cap that keeps the diaphragm in place. What can sometimes happen is that the gasket on either side of the manifold can degrade or become damaged in some way, and despite the fact that everything's fixed together tight, if this gasket is damaged then air can be drawn in once again and unbalance the air to fuel ratio. However let's say that the retaining bolt is nice and tight and we've got everything working as it should with the carburettor. Check firstly to see if it's loose and if it is simply tighten the bolt. The inlet manifold sits between the carburettor and the engine and acts as a spacer between the two.
Weed eater dies when throttled full#
If you have air coming into the carburettor unnecessarily that will cause the engine to bog down, and while there may be enough fuel for idling speed there won't be for full revs. Because the engines draw in fuel, they will also suck air in through any rupture in the pipe, and therefore affect the fuel to air ratio coming out of the carburettor and into the engine. Usually, the engine starts when you hit the right setting.The next step is to check the external parts of the fuel pipe. Adjust them in half turns in the opposite directions and see what happens. Make sure that they are properly set in their positions. The high and low screws on your weed whacker can be the root of your engine trouble as well. Then, test the rest of your machine’s electrical connections with a multimeter to be sure they are getting power. Replace a damaged or corroded one with a new one or reinstall the current one properly. Check the Spark PlugĪ corroded, damaged, or improperly installed spark plug may prevent your engine from starting as well. If this is the case, put the tubing back into place or replace it completely. Sometimes, this can be disengaged by accident or it may be damaged such that your engine is being deprived of its source of energy.
![weed eater dies when throttled weed eater dies when throttled](https://i.ebayimg.com/images/g/HuEAAOSwjvRa7NsA/s-l640.jpg)
![weed eater dies when throttled weed eater dies when throttled](https://i.ebayimg.com/images/g/6lMAAOSwk4hcYxBh/s-l300.jpg)
![weed eater dies when throttled weed eater dies when throttled](https://i.ebayimg.com/images/g/XHMAAOSwjXVaqaMt/s-l300.jpg)
If there is still a lot of fuel but the machine won’t start, check out the fuel tubing. To see whether this is the case, check the actual fuel in the tank (and compare it to the reading on the gauge for accuracy while you’re at it). If your weed eater coughs and sputters then dies, there is a big possibility that you have run out of fuel. If not, you will need to check the other parts of the weed eater for possible problems. If it runs smoothly, then you are in business. To make sure that find that nice middle ground, re-install the filter properly.Īfter making any necessary adjustments, turn the weed eater on and see if it continues to choke. This part is one of the most fickle if it is wide open, your engine gets too much air and chokes, and if it is tightly closed, no air passes through it and your engine stalls. Adjust the Filterīefore anything else, always check for the problems with the simplest fixes, starting in this case with the air filter. Fixing a frozen engine will not be so simple and may be outside the skill level of most DIYers, but an engine that sputters before it dies is easier to deal with. To determine the source of the problem, try to turn your weed eater on again and see if you can hear any activity in the engine. There are a number of reasons why your weed whacker’s engine could stall while in use, a dirty filter, low fuel level, and faulty electrical system being among them.